The one thing I enjoyed VERY much in RR1 is the storyline.
U r a young prince that went to magic school and when u got back your uncles and a witch killed your dad and took over the kingdom. And your hero being a VEEEEERY angry nephew gives them all a beat down, throws them to jail and claims back his throne.
All 4 usurpers had their own series of stages and by beating each one it took u one step closer to claiming the throne (RR1 would RULE if only the uncles and witch appeared as mini-bosses)
How about FG upgrades a current plot (e.g the ninja event) where in the final stage the chief pirate appears as miniboss and when u beat him he confesses that he s working for a corrupted Shogun and then in the next ninja event u fight in a japan themed background (already available) with the shogun appearing as the event boss, and when u beat him he ll say he works for the fat witch that escaped u from RR1 and when u beat her she ll confess that she works for the devil and then u ll fight him in the next event, and when u beat him too he ll say he works for AwesomestKnightest and when u beat him too, he ll say he works for Maerique, and when u beat him too he ll say that the final BIG boss is Madlen. In the ninja event with Madlen as the main villain all stages will have FG’s offices as a background.
With a plot like that I d eat popcorn while playing…more twists than Supernatural
Alongside the standard ninja rewards, FG could also give u the event boss for a limited time as a guardian or a primal beast (imagine Madlen as a Primal Beast…hi! hi! ), or reward u with a blueprint for a new contraption that u can permanently use in your castle defence (U miss the event or the first place u miss the blueprint)